Dr. Mercola's products are superb quality. I am so glad that iHerb offers them. Astaxanthin is supposed to be a powerful antioxidant. I often take this product after being out in the sun to prevent skin damage.

I have been using Astaxanthin for about six months. Since, my skin has never looked healthier. I recover much quicker from working out and have not been struck down with cold or flu. My health is at its optimum. I use Dr Mercola brand as being the most trusted high quality product on the market. I highly recommend it.